PHOENIX -- Authorities say an Alaska teen who had gone into respiratory arrest while on a hike at Phoenix's South Mountain Preserve has been taken to an area hospital.

Capt. Alex Rangel, a Phoenix Fire Department spokesman, said Sunday that the 14-year-old and his family had been hiking for more than four hours when the teen began to act confused and wander off. Family members called for help at about 11:30 a.m., Rangel said, and about 30 minutes later, firefighters found the teen dehydrated and unable to breathe on his own.

PHOENIX -- An Alaska teen who became disoriented then passed out after hiking more than 4½ hours Sunday at the South Mountain Preserve has died, officials confirmed Monday.

The 14-year-old was on a morning hike with family members and the group had run out of water, authorities said. He started to act confused, walked off an approximately 7-mile trail, then lost consciousness, said Capt. Alex Rangel, a Phoenix fire spokesman.

His family called for assistance at about 11:30 a.m. and it took firefighters about 30 minutes to find him on the trail, Rangel said.

By the time medics located him, the teen had stopped breathing and was without a pulse. He was transported to Maricopa Medical Center and was pronounced dead late Sunday afternoon, hospital spokesman Michael Murphy said.

I've lived here 17 years. South Mountain is five miles from my home, and things like this happen more often than you'd want to think. It's extremely sad. They were out for four hours on a day when the high hit 113, and breached 100 by 8 a.m. They had insufficient water. The adult(s) should be considered for negligent homicide. What a horrible way to go.

A search team found the body believed to be that of Bryce L. Gillies at approximately 9:30 a.m., on the top of a 100-foot pour-off. The search had been narrowed to the Bonita Creek drainage area on Saturday after several personal items belonging to Gillies, including a backpack, were found nearby.

Park officials had launched a full-scale search for the missing NAU sophomore on Friday and brought in a search dog on Saturday to help search in the remote, rugged terrain of the North Rim.

The sophomore physics major from McLean, VA, was reported missing Tuesday after failing to return from a hiking trip along the North Rim.